CVE-2021-26370

HighCVSS 7.1/10Last modified Jun 17, 2026

Description

Improper validation of destination address in SVC_LOAD_FW_IMAGE_BY_INSTANCE and SVC_LOAD_BINARY_BY_ATTRIB in a malicious UApp or ABL may allow an attacker to overwrite arbitrary bootloader memory with SPI ROM contents resulting in a loss of integrity and availability.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness enumeration

CWE-20

Affected software

No affected versions have been published.

Timeline

Published: May 10, 2022
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-263715.5A compromised or malicious ABL or UApp could send a SHA256 system call to the bootloader, which may result in exposure of ASP memory to user CVE-2021-263725.5Insufficient bound checks related to PCIE in the System Management Unit (SMU) may result in access to an invalid address space that could re CVE-2021-263735.5Insufficient bound checks in the System Management Unit (SMU) may result in a system voltage malfunction that could result in denial of reso CVE-2021-263755.5Insufficient General Purpose IO (GPIO) bounds check in System Management Unit (SMU) may result in access/updates from/to invalid address spa CVE-2021-263765.5Insufficient checks in System Management Unit (SMU) FeatureConfig may result in reenabling features potentially resulting in denial of resou CVE-2021-263774.1Insufficient parameter validation while allocating process space in the Trusted OS (TOS) may allow for a malicious userspace process to trig CVE-2021-263785.5Insufficient bound checks in the System Management Unit (SMU) may result in access to an invalid address space that could result in denial o CVE-2021-263799.8Insufficient input validation of mailbox data in the SMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially leading to a CVE-2021-263801.8A compromised Trusted OS (TOS) driver could issue a malformed call that could potentially allow memory access outside the intended range re CVE-2021-263817.1Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a lar CVE-2021-263824.4An attacker with root account privileges can load any legitimately signed firmware image into the Audio Co-Processor (ACP,) irrespective of CVE-2021-263837.9Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a com